jdhao

func! ToggleCursor(timer)
  if &cursorcolumn
    set nocursorcolumn
  else
    set cursorcolumn
  endif

  if &cursorline
    set nocursorline
  else

jdhao

OneTab

OneTab allows us to save the currently opened Tabs in Chrome for later inspection. Even if Chrome is restarted, your tab history is not lost.

Vimium

Vimium is the hacker's browser which brings Vim-like key bindings for quicker operations inside Chrome. A must have if you care about your precious time and speed.

jdhao

import cv2

img = cv2.imread('test.jpg')

# specify the write parameter, can be found in https://docs.opencv.org/master/d4/da8/group__imgcodecs.html#ga292d81be8d76901bff7988d18d2b42ac
write_param = [cv2.IMWRITE_JPEG_QUALITY, 90, cv2.IMWRITE_JPEG_OPTIMIZE, 1]

cv2.imwrite("test_new.jpg", img, write_param)

# Reference

jdhao

In python, random.choices() will select K items from a list with replacement, which means that there are may be duplicated items in the result list. If you want to select K random item from the list without duplication, you need to use random.sample() instead.

I wasted one hour debugging this issue and suddenly found the casue. Sad :[

jdhao

pyinstaller --onefile --console markdown2ctags.py

jdhao

How do I grep unicode characters using its code point?

For example, if we want to grep a(unicode code point is u+0041), we can use the following trick:

grep "$(printf '\u0041')" my_file.txt

References

jdhao

When log in to server, I see the following error message；

RSA host key for xxxx has changed and you have requested strict checking. Host key verification failed.

You can remove the offending host key from file ~/.ssh/known_hosts. For example, if line 1 includes the offending hosts info, just remove it:

sed -i.bak -e '1d' ~/.ssh/known_hosts

jdhao

#eovim
#eovim/!
AED
Builtin
CER
DT
Deoplete
Deteval
Esc
Exif

jdhao

" Remove trailing white space, see https://vi.stackexchange.com/a/456/15292
function utils#StripTrailingWhitespaces() abort
    let l:save = winsaveview()
    " vint: next-line -ProhibitCommandRelyOnUser -ProhibitCommandWithUnintendedSideEffect
    keeppatterns %s/\v\s+$//e
    call winrestview(l:save)
endfunction

" Create command alias safely, see https://bit.ly/2ImFOpL.
" The following two functions are taken from answer below on SO:

jdhao

nnoremap <F9> :w <CR> :!g++ -Wall -std=c++11 % -o %<&&./%<<CR>